| 1 |
<?php |
| 2 |
/** |
| 3 |
* XSPEED_DROPIN |
| 4 |
* XSPEED_DROPIN_VERSION: 15 |
| 5 |
* Drop-in cache loader. Serves cached HTML before WordPress fully boots. |
| 6 |
* |
| 7 |
* Bump XSPEED_DROPIN_VERSION whenever this file's serve logic changes so |
| 8 |
* Cache::ensure_dropin_current() reinstalls it on existing sites (the |
| 9 |
* "is it ours?" marker alone can't tell an old copy from a new one). |
| 10 |
* v2: read .meta on the fast path — replay 404 status + feed Content-Type |
| 11 |
* and honor per-content TTL (FBS-82406, FBS-82407). |
| 12 |
* v3: conditional GET — emit Last-Modified + ETag, answer matching |
| 13 |
* If-Modified-Since / If-None-Match with 304 (FBS-82407 #5). |
| 14 |
* v4: bail when the `.maintenance-active` sentinel is present so a page |
| 15 |
* cached while live isn't served during maintenance (FBS-82409 B1). |
| 16 |
* v5: per-site cache buckets — entries moved from `cache/xspeed/<md5>.html` |
| 17 |
* to `cache/xspeed/<host>[/<blog-path>]/<md5>.html` so a multisite |
| 18 |
* purge can be scoped to one blog. An un-bumped drop-in would keep |
| 19 |
* reading the old flat path, miss every entry and boot WordPress on |
| 20 |
* every request (#6). |
| 21 |
* v6: serve tracking-param requests from the fast path — read the |
| 22 |
* precompiled `ignored_query_params` allow-list instead of bailing on |
| 23 |
* any query string (#13). An un-bumped drop-in keeps the old bail and |
| 24 |
* campaign traffic keeps paying a full WordPress boot. |
| 25 |
* v7: the page TTL is baked in at install time from the `cache_expiry` |
| 26 |
* setting instead of a hardcoded 86400, so the drop-in enforces the |
| 27 |
* configured lifetime rather than a fixed 24h (#240). |
| 28 |
* v8: never serve an empty, stale, or short `.br` sibling — an uninflatable |
| 29 |
* brotli stream renders as a blank page. THIS FILE IS A COPY made when |
| 30 |
* caching was enabled, so without the bump an updated site keeps the old |
| 31 |
* serve logic and never receives the fix (#286). |
| 32 |
* v9: emit the edge/CDN headers baked in from `xspeed_edge_cache_headers` |
| 33 |
* on a HIT. Without the bump an existing site keeps a drop-in with no |
| 34 |
* placeholder to bake into, so an add-on's CDN headers appear on every |
| 35 |
* serve path except this one. |
| 36 |
* v10: emit `X-XSpeed-Built` — the served file's mtime — so a CDN that has |
| 37 |
* just purged can tell whether the origin answered with newer HTML or |
| 38 |
* with the same page again. Without the bump an existing site's drop-in |
| 39 |
* stays silent and every purge through it reads as unverifiable. |
| 40 |
* v11: a page whose edge answer differs from the site-wide one carries its |
| 41 |
* own pairs in the `.meta` sidecar, and they REPLACE the baked set. |
| 42 |
* Without the bump an existing drop-in keeps sending the baked pairs |
| 43 |
* for that page, lifetime and all. |
| 44 |
* v12: `XSPEED_EDGE_PROVIDER=off` empties the edge pairs here too, before |
| 45 |
* they are sent, so the emergency switch does not wait for a re-bake. |
| 46 |
* `X-XSpeed-Built` still goes out: it is a diagnostic, not an |
| 47 |
* instruction to the edge. |
| 48 |
* v13: a merge of two lines of history that had both used 9 and 10. On `dev` |
| 49 |
* they were: v9 carries the baked edge-header answer so a hold set for a |
| 50 |
* page reaches the paths that run without PHP, and v10 keeps bots, |
| 51 |
* scanners, cached 404s and xSpeed's own requests (by UA or the |
| 52 |
* X-XSpeed-Self header) out of hits.log. Everything in v9 to v12 above |
| 53 |
* and both of those are in this file. The bump is what makes a site on |
| 54 |
* either line rewrite its drop-in. |
| 55 |
* v14: the key path lowercases percent-escapes and escapes non-ASCII bytes, |
| 56 |
* the spelling Cache::normalize_path() now hashes, so `%E7`, `%e7` and |
| 57 |
* raw UTF-8 spellings of a non-ASCII slug share one key with the entry |
| 58 |
* PHP wrote. Before, PHP keyed a sanitize_text_field() copy that had |
| 59 |
* lost every escape, so these pages were never a HIT here. Without the |
| 60 |
* bump an existing site keeps computing the old key for them. |
| 61 |
* v15: two changes, one bump. |
| 62 |
* - A page with a lifetime of its own (the sidecar `ttl`: a nonce cap, |
| 63 |
* a per-post expiry) has every edge lifetime in its pairs cut to what |
| 64 |
* the copy has left. Without the bump an existing drop-in keeps |
| 65 |
* telling the edge to hold a nonce page for the site's whole lifetime. |
| 66 |
* - A HIT served for a URL carrying an ignored param (`?utm_source=…`) |
| 67 |
* sends the baked `query-variant` hold instead of the edge lifetime, |
| 68 |
* so an edge keeps only URLs a purge can name. A query string of `0` |
| 69 |
* is no longer read as no query string. Without the bump an existing |
| 70 |
* drop-in keeps telling the edge to store every variant. |
| 71 |
* |
| 72 |
* IMPORTANT: This file is included by wp-settings.php BEFORE |
| 73 |
* wp-includes/formatting.php and wp-includes/load.php are loaded, so NO |
| 74 |
* WordPress functions (sanitize_text_field, wp_unslash, is_admin, |
| 75 |
* HOUR_IN_SECONDS, etc.) are available here. Use raw PHP only. |
| 76 |
* |
| 77 |
* @package XSpeed |
| 78 |
*/ |
| 79 |
|
| 80 |
if ( ! defined( 'ABSPATH' ) ) { |
| 81 |
exit; |
| 82 |
} |
| 83 |
|
| 84 |
// Only handle plain GET requests. |
| 85 |
// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.MissingUnslash,WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- Drop-in runs before wp-includes/formatting.php loads, so wp_unslash() and sanitize_text_field() are unavailable. Value is upper-cased and matched against the literal string 'GET'; never echoed, never executed. |
| 86 |
$xspeed_method = isset( $_SERVER['REQUEST_METHOD'] ) ? strtoupper( (string) $_SERVER['REQUEST_METHOD'] ) : ''; |
| 87 |
if ( 'GET' !== $xspeed_method ) { |
| 88 |
return; |
| 89 |
} |
| 90 |
|
| 91 |
// Query-string requests. A tracking param contributes nothing to the |
| 92 |
// response, and PHP already caches `/post?utm_source=x` under the same key |
| 93 |
// as `/post` — but this file used to bail on ANY query string, so every |
| 94 |
// visitor arriving from an email or ad campaign paid a full WordPress boot |
| 95 |
// to be handed a file that was already on disk. On a marketing site that is |
| 96 |
// most of the paid traffic taking the slowest path. (#13) |
| 97 |
// |
| 98 |
// We cannot read the option or call Glob_Matcher here (WordPress is not |
| 99 |
// loaded), so Cache::sync_query_allowlist() precompiles the user's |
| 100 |
// `ignored_query_params` into a regex next to the cache files. Every key |
| 101 |
// must match it; one that doesn't means the response could genuinely vary, |
| 102 |
// so we stand down and let PHP decide. A missing sidecar means the same — |
| 103 |
// fail safe, never guess. |
| 104 |
// |
| 105 |
// A key that matches is one the cache key leaves out, so the URL it makes is |
| 106 |
// one no purge names. `$xspeed_qs_unpurged` records that for the edge hold |
| 107 |
// further down, the same test Cache::query_carries_unpurged_param() makes. |
| 108 |
// |
| 109 |
// An empty string test rather than empty(): a query string of `0` is still a |
| 110 |
// query string, and empty() let `/post?0` through as if it were `/post`. |
| 111 |
$xspeed_qs_unpurged = false; |
| 112 |
// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.MissingUnslash,WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- Drop-in runs pre-WP. Only tested for emptiness here; parsed for its keys below. |
| 113 |
if ( isset( $_SERVER['QUERY_STRING'] ) && '' !== (string) $_SERVER['QUERY_STRING'] ) { |
| 114 |
$xspeed_allow_file = WP_CONTENT_DIR . '/cache/xspeed/.ignored-query-params'; |
| 115 |
if ( ! is_readable( $xspeed_allow_file ) ) { |
| 116 |
return; |
| 117 |
} |
| 118 |
// phpcs:ignore WordPress.WP.AlternativeFunctions.file_get_contents_file_get_contents, WordPress.PHP.NoSilencedErrors.Discouraged -- pre-WP drop-in; an unreadable sidecar degrades to "let PHP handle it". |
| 119 |
$xspeed_allow_re = trim( (string) @file_get_contents( $xspeed_allow_file ) ); |
| 120 |
if ( '' === $xspeed_allow_re ) { |
| 121 |
return; |
| 122 |
} |
| 123 |
|
| 124 |
// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.MissingUnslash,WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- Drop-in runs pre-WP. parse_str() urldecodes exactly as WordPress does; only KEYS are consumed, and only as preg_match() input — never echoed, never executed. |
| 125 |
parse_str( str_replace( "\0", '', (string) $_SERVER['QUERY_STRING'] ), $xspeed_qs_params ); |
| 126 |
if ( empty( $xspeed_qs_params ) ) { |
| 127 |
return; |
| 128 |
} |
| 129 |
foreach ( array_keys( $xspeed_qs_params ) as $xspeed_qs_key ) { |
| 130 |
// Anchored: a param named `referrer` must not be waved through by |
| 131 |
// a `ref` entry. Mirrors Glob_Matcher's full-string semantics. |
| 132 |
// phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged -- a malformed baked pattern degrades to "let PHP handle it", never a warning per request. |
| 133 |
if ( 1 !== @preg_match( '#^' . $xspeed_allow_re . '$#', (string) $xspeed_qs_key ) ) { |
| 134 |
return; |
| 135 |
} |
| 136 |
$xspeed_qs_unpurged = true; |
| 137 |
} |
| 138 |
} |
| 139 |
|
| 140 |
// Honor explicit bypass header. xSpeed's own benchmark REST endpoint |
| 141 |
// sends `X-XSpeed-Bypass: 1` so we can measure uncached TTFB for the |
| 142 |
// before/after comparison on the dashboard. Harmless if a third party |
| 143 |
// sends it — they just get an uncached response. |
| 144 |
// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.MissingUnslash,WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- Drop-in runs before WP loads. Value is only used as an isset() check + literal string comparison, never echoed. |
| 145 |
if ( ! empty( $_SERVER['HTTP_X_XSPEED_BYPASS'] ) ) { |
| 146 |
return; |
| 147 |
} |
| 148 |
|
| 149 |
// Maintenance / coming-soon sentinel. The Pro Maintenance-Cache module writes |
| 150 |
// `.maintenance-active` next to the cache files whenever the site enters |
| 151 |
// maintenance / coming-soon mode, and removes it on recovery. The write-side |
| 152 |
// veto alone can't stop a page cached while the site was live from being |
| 153 |
// served here (this drop-in runs before WordPress loads), so we bail out and |
| 154 |
// let WordPress render the maintenance / coming-soon screen instead of serving |
| 155 |
// a stale real-site page. (FBS-82409 B1) |
| 156 |
if ( file_exists( WP_CONTENT_DIR . '/cache/xspeed/.maintenance-active' ) ) { |
| 157 |
return; |
| 158 |
} |
| 159 |
|
| 160 |
if ( ! isset( $_SERVER['REQUEST_URI'] ) ) { |
| 161 |
return; |
| 162 |
} |
| 163 |
|
| 164 |
// Raw-PHP sanitization: strip null bytes only. This value is used for |
| 165 |
// substring comparisons and as input to md5() — never echoed, never |
| 166 |
// executed, never written to disk as data. Magic quotes was removed in |
| 167 |
// PHP 5.4 and the plugin requires PHP 7.4+, so no unslashing is needed. |
| 168 |
// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.MissingUnslash,WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- Drop-in runs before wp_unslash()/sanitize_text_field() are loaded; null-byte strip is the strongest sanitizer available pre-WP-bootstrap. Value is only used for substring comparison and as md5() input. |
| 169 |
$xspeed_request_uri = str_replace( "\0", '', (string) $_SERVER['REQUEST_URI'] ); |
| 170 |
|
| 171 |
// Skip admin / login requests. |
| 172 |
if ( false !== strpos( $xspeed_request_uri, '/wp-admin' ) || false !== strpos( $xspeed_request_uri, '/wp-login' ) ) { |
| 173 |
return; |
| 174 |
} |
| 175 |
|
| 176 |
// Skip logged-in users and comment authors — never serve a cached page to |
| 177 |
// someone who has a session cookie. Reading raw cookies; we only inspect |
| 178 |
// names, not values. |
| 179 |
if ( ! empty( $_COOKIE ) ) { |
| 180 |
foreach ( $_COOKIE as $xspeed_cookie_name => $xspeed_cookie_value ) { |
| 181 |
unset( $xspeed_cookie_value ); |
| 182 |
$xspeed_cookie_name = (string) $xspeed_cookie_name; |
| 183 |
if ( 0 === strpos( $xspeed_cookie_name, 'wordpress_logged_in' ) |
| 184 |
|| 0 === strpos( $xspeed_cookie_name, 'comment_author_' ) |
| 185 |
|| 0 === strpos( $xspeed_cookie_name, 'wp-postpass_' ) |
| 186 |
// The generic bypass cookie PHP sets whenever it decides a |
| 187 |
// visitor must not be served from cache (Server_Rules:: |
| 188 |
// BYPASS_COOKIE). Covers repeat visitors even when the baked |
| 189 |
// rules below are stale. |
| 190 |
|| 'wordpress_no_cache' === $xspeed_cookie_name ) { |
| 191 |
return; |
| 192 |
} |
| 193 |
} |
| 194 |
} |
| 195 |
|
| 196 |
// The user's own excluded-cookie list, baked in at install time by |
| 197 |
// Cache::install_dropin() (the token is replaced with an escaped regex |
| 198 |
// built by Server_Rules). The drop-in runs before WordPress loads and so |
| 199 |
// cannot read the settings itself; without this, every cart / membership |
| 200 |
// / custom cookie rule applied only while a page was cold, and a warm |
| 201 |
// page was served to exactly the visitors the settings excluded. |
| 202 |
// |
| 203 |
// An un-substituted token means the drop-in was copied straight from a |
| 204 |
// source checkout — fall back to serving nothing from the fast path |
| 205 |
// rather than treating the literal token as a pattern. |
| 206 |
$xspeed_cookie_re = '@@XSPEED_COOKIE_RE@@'; |
| 207 |
if ( '@@' !== substr( $xspeed_cookie_re, 0, 2 ) && '' !== $xspeed_cookie_re && ! empty( $_COOKIE ) ) { |
| 208 |
foreach ( array_keys( $_COOKIE ) as $xspeed_cookie_name ) { |
| 209 |
// phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged -- a malformed baked pattern must degrade to "don't serve from cache", never warn on every request. |
| 210 |
if ( 1 === @preg_match( '#(' . $xspeed_cookie_re . ')#i', (string) $xspeed_cookie_name ) ) { |
| 211 |
return; |
| 212 |
} |
| 213 |
} |
| 214 |
} |
| 215 |
|
| 216 |
// Same for the user-agent bypass list. This is the rule the bypass cookie |
| 217 |
// can never cover: a bot's very first request to a warm page never |
| 218 |
// reaches PHP, so there is no earlier request in which to set a cookie. |
| 219 |
$xspeed_ua_re = '@@XSPEED_UA_RE@@'; |
| 220 |
if ( '@@' !== substr( $xspeed_ua_re, 0, 2 ) && '' !== $xspeed_ua_re ) { |
| 221 |
// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.MissingUnslash,WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- Drop-in runs pre-WP. Value is only matched against a baked, pre-escaped regex; never echoed or executed. |
| 222 |
$xspeed_ua_raw = isset( $_SERVER['HTTP_USER_AGENT'] ) ? (string) $_SERVER['HTTP_USER_AGENT'] : ''; |
| 223 |
// phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged -- see above; degrade to bypass rather than warn. |
| 224 |
if ( '' !== $xspeed_ua_raw && 1 === @preg_match( '#(' . $xspeed_ua_re . ')#i', $xspeed_ua_raw ) ) { |
| 225 |
return; |
| 226 |
} |
| 227 |
} |
| 228 |
|
| 229 |
// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.MissingUnslash,WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- Drop-in runs before wp_unslash()/sanitize_text_field() are loaded. Value is filtered through a strict allowlist regex below (letters, digits, dot, hyphen, colon) and only used as md5() input for the cache key. |
| 230 |
$xspeed_host = isset( $_SERVER['HTTP_HOST'] ) ? (string) $_SERVER['HTTP_HOST'] : 'default'; |
| 231 |
$xspeed_host = str_replace( "\0", '', $xspeed_host ); |
| 232 |
// Restrict host to a safe charset (letters, digits, dot, hyphen, colon for port). |
| 233 |
$xspeed_host = preg_replace( '/[^a-zA-Z0-9.\-:]/', '', $xspeed_host ); |
| 234 |
|
| 235 |
$xspeed_path_only = (string) strtok( $xspeed_request_uri, '?' ); |
| 236 |
|
| 237 |
// Path spelling. MUST mirror XSpeed\Cache::normalize_path() exactly. |
| 238 |
// WordPress links carry lower-case escapes and browsers send upper-case ones, |
| 239 |
// so escapes are lowercased, and a byte outside printable ASCII is escaped the |
| 240 |
// same way. Nothing is decoded. Without this a non-ASCII slug requested as |
| 241 |
// `%E7…` or as raw UTF-8 hashes to a different key than the one |
| 242 |
// Cache::store() wrote. A plain ASCII path passes through unchanged. The |
| 243 |
// site-path match below sees this spelling too; blog paths are plain ASCII. |
| 244 |
$xspeed_path_only = (string) preg_replace_callback( |
| 245 |
'/%[0-9a-fA-F]{2}|[^\x21-\x7E]/', |
| 246 |
static function ( $xspeed_m ) { |
| 247 |
return '%' === $xspeed_m[0][0] ? strtolower( $xspeed_m[0] ) : sprintf( '%%%02x', ord( $xspeed_m[0] ) ); |
| 248 |
}, |
| 249 |
$xspeed_path_only |
| 250 |
); |
| 251 |
|
| 252 |
// Device bucket — MUST mirror XSpeed\Cache::cache_key() exactly, or the key |
| 253 |
// the drop-in computes won't match the file Cache::store() wrote, the HIT |
| 254 |
// branch below never fires, and every request falls through to a full |
| 255 |
// WordPress boot (defeating the whole point of the pre-WP drop-in). |
| 256 |
// |
| 257 |
// Cache::cache_key() appends '|m' / '|d' when the cache module's |
| 258 |
// `mobile_separate` setting is on. The drop-in can't read WP options |
| 259 |
// (it runs before WordPress loads), so Cache writes a zero-byte sidecar |
| 260 |
// flag — `.mobile-separate` next to the cache files — whenever that setting |
| 261 |
// is on, and removes it when off (see Cache::sync_mobile_flag()). We mirror |
| 262 |
// the same UA token list wp_is_mobile() uses, the same one Cache's inline |
| 263 |
// fallback detector uses. |
| 264 |
$xspeed_device = ''; |
| 265 |
if ( file_exists( WP_CONTENT_DIR . '/cache/xspeed/.mobile-separate' ) ) { |
| 266 |
// Mirror core's wp_is_mobile() EXACTLY (which Cache::is_mobile_request() |
| 267 |
// defers to): check the Sec-CH-UA-Mobile client hint first, then fall |
| 268 |
// back to the same UA token list. Any divergence from the engine's |
| 269 |
// detection re-introduces the key mismatch this whole flag exists to |
| 270 |
// prevent. |
| 271 |
$xspeed_is_mobile = false; |
| 272 |
if ( isset( $_SERVER['HTTP_SEC_CH_UA_MOBILE'] ) ) { |
| 273 |
// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.MissingUnslash,WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- Drop-in runs pre-WP. Value is compared against the literal '?1', never echoed or executed. |
| 274 |
$xspeed_is_mobile = ( '?1' === $_SERVER['HTTP_SEC_CH_UA_MOBILE'] ); |
| 275 |
} else { |
| 276 |
// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.MissingUnslash,WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- Drop-in runs before wp_unslash()/sanitize_text_field() load. Value is only matched against a literal token regex, never echoed or executed. |
| 277 |
$xspeed_ua = isset( $_SERVER['HTTP_USER_AGENT'] ) ? (string) $_SERVER['HTTP_USER_AGENT'] : ''; |
| 278 |
$xspeed_is_mobile = (bool) preg_match( '/(Mobile|Android|Silk\/|Kindle|BlackBerry|Opera Mini|Opera Mobi)/i', $xspeed_ua ); |
| 279 |
} |
| 280 |
$xspeed_device = $xspeed_is_mobile ? '|m' : '|d'; |
| 281 |
} |
| 282 |
|
| 283 |
$xspeed_cache_key = md5( $xspeed_host . $xspeed_path_only . $xspeed_device ); |
| 284 |
|
| 285 |
// Per-site bucket. MUST mirror XSpeed\Cache::current_host_dir() exactly — |
| 286 |
// same charset, same trimmed dots, same 'default' fallback, same multisite |
| 287 |
// path prefix — or the drop-in looks in a directory Cache::store() never |
| 288 |
// wrote to, every HIT misses, and every request falls through to a full |
| 289 |
// WordPress boot. |
| 290 |
// |
| 291 |
// Note this is NOT $xspeed_host: the cache KEY keeps the colon of |
| 292 |
// `host:port` (it only ever feeds md5()), while the DIRECTORY cannot — |
| 293 |
// a colon is not portable in a path. (#6) |
| 294 |
$xspeed_host_dir = $xspeed_host; |
| 295 |
$xspeed_host_colon = strpos( $xspeed_host_dir, ':' ); |
| 296 |
if ( false !== $xspeed_host_colon ) { |
| 297 |
$xspeed_host_dir = substr( $xspeed_host_dir, 0, $xspeed_host_colon ); |
| 298 |
} |
| 299 |
$xspeed_host_dir = preg_replace( '/[^a-zA-Z0-9.\-]/', '', $xspeed_host_dir ); |
| 300 |
$xspeed_host_dir = preg_replace( '/\.{2,}/', '.', (string) $xspeed_host_dir ); |
| 301 |
$xspeed_host_dir = trim( (string) $xspeed_host_dir, '.-' ); |
| 302 |
if ( '' === $xspeed_host_dir ) { |
| 303 |
$xspeed_host_dir = 'default'; |
| 304 |
} |
| 305 |
|
| 306 |
// Subdirectory multisite: every blog shares one host, so the host alone |
| 307 |
// would put them all in one bucket and they would keep purging each other. |
| 308 |
// We cannot call is_multisite()/get_blog_details() here (WordPress is not |
| 309 |
// loaded), so Cache::sync_site_paths() persists the network's blog paths |
| 310 |
// as `<raw-path>|<segment>` lines, longest first. Prefix-match the URI. |
| 311 |
$xspeed_paths_file = WP_CONTENT_DIR . '/cache/xspeed/.site-paths'; |
| 312 |
if ( file_exists( $xspeed_paths_file ) ) { |
| 313 |
$xspeed_uri_trimmed = ltrim( (string) $xspeed_path_only, '/' ); |
| 314 |
// phpcs:ignore WordPress.WP.AlternativeFunctions.file_get_contents_file_get_contents -- our own sidecar; WP_Filesystem is not loaded pre-WP. |
| 315 |
$xspeed_paths_raw = (string) @file_get_contents( $xspeed_paths_file ); // phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged -- unreadable sidecar just means "no prefix". |
| 316 |
foreach ( explode( "\n", $xspeed_paths_raw ) as $xspeed_path_line ) { |
| 317 |
$xspeed_sep = strpos( $xspeed_path_line, '|' ); |
| 318 |
if ( false === $xspeed_sep ) { |
| 319 |
continue; |
| 320 |
} |
| 321 |
$xspeed_raw_path = substr( $xspeed_path_line, 0, $xspeed_sep ); |
| 322 |
$xspeed_segment = substr( $xspeed_path_line, $xspeed_sep + 1 ); |
| 323 |
if ( '' === $xspeed_raw_path || '' === $xspeed_segment ) { |
| 324 |
continue; |
| 325 |
} |
| 326 |
if ( $xspeed_uri_trimmed === $xspeed_raw_path |
| 327 |
|| 0 === strpos( $xspeed_uri_trimmed, $xspeed_raw_path . '/' ) ) { |
| 328 |
$xspeed_host_dir .= '/' . $xspeed_segment; |
| 329 |
break; |
| 330 |
} |
| 331 |
} |
| 332 |
} |
| 333 |
|
| 334 |
$xspeed_cache_dir = WP_CONTENT_DIR . '/cache/xspeed/' . $xspeed_host_dir . '/'; |
| 335 |
$xspeed_cache_file = $xspeed_cache_dir . $xspeed_cache_key . '.html'; |
| 336 |
$xspeed_meta_file = $xspeed_cache_dir . $xspeed_cache_key . '.meta'; |
| 337 |
|
| 338 |
if ( file_exists( $xspeed_cache_file ) ) { |
| 339 |
// Read the .meta sidecar (status / content_type / ttl) the same way the |
| 340 |
// PHP HIT path does — the drop-in serves cached feeds and 404s too, so it |
| 341 |
// must replay their Content-Type / status and honor their per-content TTL. |
| 342 |
// Ordinary 200 text/html pages have no .meta (the common path stays fast). |
| 343 |
// (FBS-82406 soft-404, FBS-82407 feed content-type + TTL) |
| 344 |
$xspeed_meta = array(); |
| 345 |
if ( file_exists( $xspeed_meta_file ) ) { |
| 346 |
// phpcs:ignore WordPress.WP.AlternativeFunctions.file_get_contents_file_get_contents -- pre-WP drop-in; one tiny JSON sidecar. |
| 347 |
$xspeed_meta_raw = file_get_contents( $xspeed_meta_file ); |
| 348 |
if ( false !== $xspeed_meta_raw ) { |
| 349 |
$xspeed_decoded = json_decode( $xspeed_meta_raw, true ); |
| 350 |
if ( is_array( $xspeed_decoded ) ) { |
| 351 |
$xspeed_meta = $xspeed_decoded; |
| 352 |
} |
| 353 |
} |
| 354 |
} |
| 355 |
|
| 356 |
// Per-content TTL from meta (e.g. feeds) falls back to the site's |
| 357 |
// configured cache_expiry, baked in at install time by |
| 358 |
// Cache::install_dropin() and re-baked on every settings save. The |
| 359 |
// drop-in runs before WordPress loads and so cannot read the option |
| 360 |
// itself; without this it applied a hardcoded 24h to every ordinary |
| 361 |
// page — write_meta() only writes a `ttl` sidecar when the value differs |
| 362 |
// from the page default, so ordinary pages carry no sidecar at all. |
| 363 |
// That served stale content under Conservative (12h) and refused the |
| 364 |
// fast path for 6 of 7 days under Aggressive (168h). (#240) |
| 365 |
// |
| 366 |
// An un-substituted token means the drop-in was copied straight from a |
| 367 |
// source checkout — fall back to the historical 24h literal rather than |
| 368 |
// treating the token as a number. HOUR_IN_SECONDS isn't defined yet. |
| 369 |
$xspeed_default_ttl = '@@XSPEED_DEFAULT_TTL@@'; |
| 370 |
$xspeed_unbaked = ( '@@' === substr( $xspeed_default_ttl, 0, 2 ) || (int) $xspeed_default_ttl < 1 ); |
| 371 |
$xspeed_default_ttl = $xspeed_unbaked ? 86400 : (int) $xspeed_default_ttl; |
| 372 |
if ( $xspeed_unbaked ) { |
| 373 |
// Make the un-substituted state observable. Serving the 24h literal |
| 374 |
// silently is exactly how the original bug stayed invisible; a site |
| 375 |
// on this path is enforcing a lifetime nobody configured. |
| 376 |
header( 'X-XSpeed-Cache-TTL: default (unbaked)' ); |
| 377 |
} |
| 378 |
|
| 379 |
$xspeed_ttl = ( isset( $xspeed_meta['ttl'] ) && (int) $xspeed_meta['ttl'] > 0 ) ? (int) $xspeed_meta['ttl'] : $xspeed_default_ttl; |
| 380 |
$xspeed_age = time() - filemtime( $xspeed_cache_file ); |
| 381 |
if ( $xspeed_age < $xspeed_ttl ) { |
| 382 |
// PHP-served cache hit (the ~85ms fallback path). The nginx static |
| 383 |
// rewrite sends "HIT (nginx)" for the fast 5-15ms path; same header, |
| 384 |
// distinct value so you can tell which layer served the page. |
| 385 |
header( 'X-XSpeed-Cache: HIT (php)' ); |
| 386 |
|
| 387 |
// Edge/CDN headers decided by Cache::edge_headers_for(). No filter |
| 388 |
// can run here — plugins are not loaded — so Cache::install_dropin() |
| 389 |
// bakes the resolved pairs into the literal below and re-bakes them |
| 390 |
// on every cache settings save. |
| 391 |
// |
| 392 |
// An un-substituted placeholder means this file was copied straight |
| 393 |
// from a source checkout: it stays a string, is_array() rejects it, |
| 394 |
// and the HIT is served with no edge headers rather than a fatal. |
| 395 |
$xspeed_edge_headers = '@@XSPEED_EDGE_HEADERS@@'; |
| 396 |
|
| 397 |
// A page whose answer differs from the site-wide one carries its own |
| 398 |
// pairs in the sidecar. It REPLACES the baked set rather than adding |
| 399 |
// to it: the two describe the same response, and merging would leave |
| 400 |
// the baked lifetime in place beside the hold meant to overrule it. |
| 401 |
if ( isset( $xspeed_meta['edge_headers'] ) && is_array( $xspeed_meta['edge_headers'] ) ) { |
| 402 |
$xspeed_edge_headers = $xspeed_meta['edge_headers']; |
| 403 |
} |
| 404 |
|
| 405 |
// A URL carrying an ignored param gets the hold baked for it instead. |
| 406 |
// This file serves `/post?utm_source=x` from the entry stored for |
| 407 |
// `/post`, but an edge keys on the full URL, so it would store each |
| 408 |
// variant as its own copy, and a purge of `/post` never reaches them. |
| 409 |
// Holding the variants keeps the edge to URLs a purge can name. This |
| 410 |
// file keeps serving them; only the edge copy is refused. |
| 411 |
// |
| 412 |
// It replaces the sidecar too, since that carries a lifetime. The |
| 413 |
// page's `Cache-Tag` is kept, as Cache::edge_headers_for() keeps it on |
| 414 |
// every hold. An empty literal means the hold would say the same as |
| 415 |
// the plain answer, and nothing changes. An un-substituted token |
| 416 |
// stays a string and is ignored. |
| 417 |
$xspeed_query_hold = '@@XSPEED_EDGE_QUERY_HOLD@@'; |
| 418 |
if ( $xspeed_qs_unpurged && is_array( $xspeed_query_hold ) && array() !== $xspeed_query_hold ) { |
| 419 |
$xspeed_query_tag = ( is_array( $xspeed_edge_headers ) && isset( $xspeed_edge_headers['Cache-Tag'] ) ) |
| 420 |
? $xspeed_edge_headers['Cache-Tag'] |
| 421 |
: null; |
| 422 |
$xspeed_edge_headers = $xspeed_query_hold; |
| 423 |
if ( null !== $xspeed_query_tag ) { |
| 424 |
$xspeed_edge_headers['Cache-Tag'] = $xspeed_query_tag; |
| 425 |
} |
| 426 |
} |
| 427 |
|
| 428 |
// The one setting this file reads for itself. Everything else about |
| 429 |
// the edge answer is baked, because re-deriving it here would mean |
| 430 |
// loading options before WordPress exists. `off` is the exception |
| 431 |
// because it is the emergency switch: when something is wrong in |
| 432 |
// production at three in the morning, waiting for a re-bake is not an |
| 433 |
// answer. Any other value is a pin, and a pin is already baked in. |
| 434 |
if ( defined( 'XSPEED_EDGE_PROVIDER' ) && 'off' === strtolower( (string) XSPEED_EDGE_PROVIDER ) ) { |
| 435 |
$xspeed_edge_headers = array(); |
| 436 |
} |
| 437 |
|
| 438 |
// A page with a lifetime of its own (a nonce it carries, a per-post |
| 439 |
// expiry: the sidecar `ttl`) may not be kept at the edge past it. A |
| 440 |
// lifetime in the pairs is the site's, so it is cut to what this copy |
| 441 |
// has left. Without the cut a page capped to its nonce went to the edge |
| 442 |
// with the site's lifetime and served a dead nonce until the next purge. |
| 443 |
// |
| 444 |
// The two patterns copy Cache::EDGE_LIFETIME_HEADER and |
| 445 |
// Cache::EDGE_LIFETIME_DIRECTIVE, and the cut copies |
| 446 |
// Cache::cap_edge_lifetime(): the class is not loaded yet. |
| 447 |
if ( is_array( $xspeed_edge_headers ) && isset( $xspeed_meta['ttl'] ) && (int) $xspeed_meta['ttl'] > 0 ) { |
| 448 |
$xspeed_left = max( 0, $xspeed_ttl - $xspeed_age ); |
| 449 |
foreach ( $xspeed_edge_headers as $xspeed_edge_name => $xspeed_edge_value ) { |
| 450 |
if ( ! preg_match( '/(?:^|-)control$/i', (string) $xspeed_edge_name ) ) { |
| 451 |
continue; |
| 452 |
} |
| 453 |
$xspeed_capped = preg_replace_callback( |
| 454 |
'/(?<![\w-])(max-age|s-maxage)\s*=\s*"?(\d+)"?/i', |
| 455 |
static function ( array $m ) use ( $xspeed_left ): string { |
| 456 |
return $m[1] . '=' . min( (int) $m[2], $xspeed_left ); |
| 457 |
}, |
| 458 |
(string) $xspeed_edge_value |
| 459 |
); |
| 460 |
if ( is_string( $xspeed_capped ) ) { |
| 461 |
$xspeed_edge_headers[ $xspeed_edge_name ] = $xspeed_capped; |
| 462 |
} |
| 463 |
} |
| 464 |
} |
| 465 |
|
| 466 |
if ( is_array( $xspeed_edge_headers ) ) { |
| 467 |
foreach ( $xspeed_edge_headers as $xspeed_edge_name => $xspeed_edge_value ) { |
| 468 |
header( $xspeed_edge_name . ': ' . $xspeed_edge_value ); |
| 469 |
} |
| 470 |
} |
| 471 |
|
| 472 |
// When this page's HTML was generated, so a CDN that just asked for a |
| 473 |
// purge can check whether the origin actually served something newer. |
| 474 |
// The cache file's mtime is that moment: store_static() writes the |
| 475 |
// file at the end of the render it came from. |
| 476 |
// |
| 477 |
// Emitted AFTER the baked pairs above and therefore replacing any |
| 478 |
// build stamp among them. A baked value is the time the DROP-IN was |
| 479 |
// installed, identical on every page for as long as it stays |
| 480 |
// installed, so it would answer "yes, freshly built" to every purge |
| 481 |
// check forever. Cache::edge_headers_for() already drops it from the |
| 482 |
// bake; this ordering means a drop-in installed by an older version |
| 483 |
// cannot lie either. |
| 484 |
header( 'X-XSpeed-Built: ' . (int) filemtime( $xspeed_cache_file ) ); |
| 485 |
|
| 486 |
// Record the HIT for the dashboard hit-ratio. The drop-in runs |
| 487 |
// BEFORE WordPress loads, so it can't call Hit_Counter — instead |
| 488 |
// it appends one line to the same hits.log the nginx static path |
| 489 |
// uses, and Hit_Counter::collect_nginx_log_hits() drains + counts |
| 490 |
// both on the next dashboard load. Without this, every drop-in HIT |
| 491 |
// was served but never counted, so the hit ratio sat at 0. |
| 492 |
// Best-effort: a failed append must never break serving the page. |
| 493 |
// |
| 494 |
// Path is baked in at install time by Cache::install_dropin(), which |
| 495 |
// replaces the @@XSPEED_HITS_LOG@@ token on the next line with the |
| 496 |
// resolved absolute path (uploads/xspeed/hits.log — NOT the cache dir, |
| 497 |
// which gets deleted on purge/uninstall and would take nginx down, |
| 498 |
// FBS-82478). The default below is the fallback for an un-substituted |
| 499 |
// drop-in (e.g. run straight from a dev source checkout); the installed |
| 500 |
// copy always carries the absolute uploads path. |
| 501 |
$xspeed_hits_log = '@@XSPEED_HITS_LOG@@'; // replaced at install |
| 502 |
if ( '@@' === substr( $xspeed_hits_log, 0, 2 ) ) { |
| 503 |
$xspeed_hits_log = WP_CONTENT_DIR . '/uploads/xspeed/hits.log'; |
| 504 |
} |
| 505 |
// Don't count a bot, a scanner, a 404 or one of xSpeed's own |
| 506 |
// requests as a visitor hit. It has to be decided HERE: the log line |
| 507 |
// is just "hit" with no user agent, so Hit_Counter batch-counts these |
| 508 |
// lines blind and nothing downstream can reclassify one. The UA |
| 509 |
// pattern is baked in at install time from |
| 510 |
// Hit_Counter::excluded_ua_regex() (the drop-in runs before |
| 511 |
// WordPress, so it cannot ask). xSpeed's own requests also carry the |
| 512 |
// X-XSpeed-Self header (Self_Traffic::HEADER), which is what catches |
| 513 |
// a warmer renamed to a real browser's UA without dropping real |
| 514 |
// visitors on that browser. An empty UA counts as automated, like |
| 515 |
// is_bot_ua(''). A cached 404 is excluded on the PHP path too. |
| 516 |
// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.MissingUnslash,WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- pre-WP drop-in; only matched against a baked pattern, never echoed or stored. |
| 517 |
$xspeed_hit_ua = isset( $_SERVER['HTTP_USER_AGENT'] ) ? (string) $_SERVER['HTTP_USER_AGENT'] : ''; |
| 518 |
$xspeed_hit_ex = '@@XSPEED_HIT_EXCLUDE_RE@@'; |
| 519 |
$xspeed_self = '' === $xspeed_hit_ua |
| 520 |
|| ! empty( $_SERVER['HTTP_X_XSPEED_SELF'] ) |
| 521 |
|| ( isset( $xspeed_meta['status'] ) && 404 === (int) $xspeed_meta['status'] ); |
| 522 |
if ( ! $xspeed_self && '@@' !== substr( $xspeed_hit_ex, 0, 2 ) && '' !== $xspeed_hit_ex ) { |
| 523 |
// phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged -- a pattern this file did not compose is not worth a warning on every hit. |
| 524 |
$xspeed_self = 1 === @preg_match( '#(' . $xspeed_hit_ex . ')#i', $xspeed_hit_ua ); |
| 525 |
} |
| 526 |
if ( ! $xspeed_self ) { |
| 527 |
// phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged, WordPress.WP.AlternativeFunctions.file_system_operations_file_put_contents -- pre-WP drop-in; WP_Filesystem isn't loaded. One short line, append + lock; failures are non-fatal (the ratio just under-counts). |
| 528 |
@file_put_contents( $xspeed_hits_log, "hit\n", FILE_APPEND | LOCK_EX ); |
| 529 |
} |
| 530 |
|
| 531 |
// Replay the cached response's status + content-type from .meta, so a |
| 532 |
// cached 404 serves 404 (not a soft-404 200) and a cached feed serves |
| 533 |
// application/rss+xml (not text/html). (FBS-82406, FBS-82407) |
| 534 |
if ( ! empty( $xspeed_meta['status'] ) && function_exists( 'http_response_code' ) ) { |
| 535 |
http_response_code( (int) $xspeed_meta['status'] ); |
| 536 |
} |
| 537 |
if ( ! empty( $xspeed_meta['content_type'] ) && is_string( $xspeed_meta['content_type'] ) ) { |
| 538 |
header( 'Content-Type: ' . $xspeed_meta['content_type'] ); |
| 539 |
} |
| 540 |
|
| 541 |
// Conditional GET: Last-Modified + ETag from the cache file's mtime, |
| 542 |
// answer a matching If-Modified-Since / If-None-Match with 304 so |
| 543 |
// aggregators skip re-downloading an unchanged cached feed/page. |
| 544 |
// (FBS-82407 #5) |
| 545 |
$xspeed_mtime = (int) filemtime( $xspeed_cache_file ); |
| 546 |
if ( $xspeed_mtime > 0 ) { |
| 547 |
$xspeed_lastmod = gmdate( 'D, d M Y H:i:s', $xspeed_mtime ) . ' GMT'; |
| 548 |
$xspeed_etag = '"' . md5( $xspeed_cache_file . '|' . $xspeed_mtime ) . '"'; |
| 549 |
header( 'Last-Modified: ' . $xspeed_lastmod ); |
| 550 |
header( 'ETag: ' . $xspeed_etag ); |
| 551 |
// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.MissingUnslash,WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- pre-WP drop-in; values only compared to a server-generated etag / parsed as a date, never echoed or executed. |
| 552 |
$xspeed_inm = isset( $_SERVER['HTTP_IF_NONE_MATCH'] ) ? trim( (string) $_SERVER['HTTP_IF_NONE_MATCH'] ) : ''; |
| 553 |
// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.MissingUnslash,WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- as above. |
| 554 |
$xspeed_ims = isset( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ? trim( (string) $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) : ''; |
| 555 |
if ( ( '' !== $xspeed_inm && false !== strpos( $xspeed_inm, $xspeed_etag ) ) |
| 556 |
|| ( '' !== $xspeed_ims && false !== ( $xspeed_ims_ts = strtotime( $xspeed_ims ) ) && $xspeed_ims_ts >= $xspeed_mtime ) ) { |
| 557 |
if ( function_exists( 'http_response_code' ) ) { |
| 558 |
http_response_code( 304 ); |
| 559 |
} |
| 560 |
exit; |
| 561 |
} |
| 562 |
} |
| 563 |
|
| 564 |
// Serve the precompressed Brotli sibling when the client accepts it |
| 565 |
// and the Pro Brotli module wrote <file>.br. MUST mirror |
| 566 |
// XSpeed\Cache::maybe_serve_brotli() on the non-drop-in serve path — |
| 567 |
// both decide on the same Accept-Encoding token match + sibling |
| 568 |
// existence, so the response is identical whichever path serves. |
| 569 |
// pre-WP: no sanitize_text_field()/wp_unslash(); the value is only |
| 570 |
// lowercased + regex-matched, never echoed. |
| 571 |
// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.MissingUnslash,WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- pre-WP drop-in; value is only lowercased + token-matched, never echoed or executed. |
| 572 |
$xspeed_accept_enc = isset( $_SERVER['HTTP_ACCEPT_ENCODING'] ) ? strtolower( str_replace( "\0", '', (string) $_SERVER['HTTP_ACCEPT_ENCODING'] ) ) : ''; |
| 573 |
$xspeed_br_file = $xspeed_cache_file . '.br'; |
| 574 |
|
| 575 |
// Existence is NOT enough: an empty or stale sibling is unservable. |
| 576 |
// Mirrors XSpeed\Cache::brotli_sibling_is_usable(); inlined because |
| 577 |
// this file runs before WordPress and cannot call it. |
| 578 |
// |
| 579 |
// Deliberately NO size-ratio floor. Brotli's ratio is unbounded on |
| 580 |
// repetitive input — a ~1 MB page of table rows compresses to about |
| 581 |
// 0.04% — so a floor rejects genuinely good siblings and silently |
| 582 |
// serves the uncompressed page. |
| 583 |
// |
| 584 |
// Truncation is instead caught exactly, from the byte count the |
| 585 |
// writer recorded in `<file>.br.size` when it published the sibling. |
| 586 |
// A stream shorter than its own declared length cannot inflate; one |
| 587 |
// that matches was published whole. Where no record exists — a |
| 588 |
// sibling written before this version, which is precisely the |
| 589 |
// already-broken file sitting on a live site right now — the checks |
| 590 |
// below still apply and the atomic writer stops new ones appearing. |
| 591 |
$xspeed_br_ok = false; |
| 592 |
if ( is_readable( $xspeed_br_file ) ) { |
| 593 |
// phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged -- pre-WP drop-in; a stat failure means "don't serve it", handled by the size checks. |
| 594 |
$xspeed_br_size = (int) @filesize( $xspeed_br_file ); |
| 595 |
// phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged -- as above. |
| 596 |
$xspeed_html_size = (int) @filesize( $xspeed_cache_file ); |
| 597 |
// phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged -- as above. |
| 598 |
$xspeed_br_mtime = (int) @filemtime( $xspeed_br_file ); |
| 599 |
|
| 600 |
// MUST mirror XSpeed\Cache::brotli_expected_size(); 0 means "no |
| 601 |
// record", never "zero bytes". |
| 602 |
$xspeed_br_expected = 0; |
| 603 |
$xspeed_br_sidecar = $xspeed_br_file . '.size'; |
| 604 |
if ( is_readable( $xspeed_br_sidecar ) ) { |
| 605 |
// phpcs:ignore WordPress.WP.AlternativeFunctions.file_get_contents_file_get_contents,WordPress.PHP.NoSilencedErrors.Discouraged -- pre-WP drop-in; an unreadable sidecar means "unknown", handled by the cast. |
| 606 |
$xspeed_br_expected = (int) trim( (string) @file_get_contents( $xspeed_br_sidecar ) ); |
| 607 |
if ( $xspeed_br_expected < 0 ) { |
| 608 |
$xspeed_br_expected = 0; |
| 609 |
} |
| 610 |
} |
| 611 |
|
| 612 |
$xspeed_br_ok = $xspeed_br_size > 0 |
| 613 |
&& $xspeed_html_size > 0 |
| 614 |
// Not stale: a sibling older than the page would serve the |
| 615 |
// previous revision under the current entry's ETag. |
| 616 |
&& ( $xspeed_br_mtime <= 0 || $xspeed_mtime <= 0 || $xspeed_br_mtime >= $xspeed_mtime ) |
| 617 |
// Not truncated, where the writer left a length to check. |
| 618 |
&& ( $xspeed_br_expected <= 0 || $xspeed_br_size === $xspeed_br_expected ); |
| 619 |
} |
| 620 |
|
| 621 |
if ( preg_match( '/(^|[\s,])br([\s,;]|$)/', $xspeed_accept_enc ) |
| 622 |
&& $xspeed_br_ok ) { |
| 623 |
header( 'Content-Encoding: br' ); |
| 624 |
header( 'Vary: Accept-Encoding', false ); |
| 625 |
header_remove( 'Content-Length' ); |
| 626 |
// phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_readfile -- Drop-in runs before WP_Filesystem is available; readfile streams the precompressed sibling directly. |
| 627 |
readfile( $xspeed_br_file ); |
| 628 |
exit; |
| 629 |
} |
| 630 |
|
| 631 |
// phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_readfile -- Drop-in runs before WP_Filesystem is available; readfile is optimal for streaming a static cache file to the visitor. |
| 632 |
readfile( $xspeed_cache_file ); |
| 633 |
exit; |
| 634 |
} |
| 635 |
} |
| 636 |
|
